18 results about "Reservoir volume" patented technology

The invention discloses a shale oil reservoir volume fractured horizontal well'stuffiness-drainage-production 'integrated physical simulation method, which comprises the following steps: drilling a shale oil reservoir full-diameter plunger rock sample, and completing rock sample pretreatment; wax-sealing the pretreated rock sample, and vacuumizing and pressurizing to saturate heavy water; displacing the saturated heavy water rock sample with the compounded in-situ crude oil until a bound water state; wax seals are removed, quartz sand is laid on the end faces of the rock samples, the rock samples are spliced to form a volume fracturing horizontal well physical model, and the volume fracturing horizontal well physical model is loaded into a rock sample holder; heavy water is pumped into the inlet end of the rock sample holder and pressurized, the inlet end is closed, and the well closing process after fracturing is simulated; and opening the inlet end of the rock sample holder, and simulating flowback production after fracturing. According to the experimental method, the'stuffy-drainage-mining 'physical process of the shale oil volume fractured horizontal well can be restored, fluid imbibition, flowing and occurrence rules are researched, and efficient development of shale oil reservoirs is guided.

This invention relates to water conservancy and hydropower engineering technology, and discloses a method for determining the volume of regulating reservoirs in multi-stage series hydropower stations with small tributary flow capacity and high requirements for coordinated operation of water volume between cascades. This method ensures the safety requirements of coordinated operation of the cascade power stations while also considering the economic efficiency of the project. The method for determining the volume of regulating reservoirs between strong hydraulic coupling multi-stage series hydropower stations provided by this invention includes: firstly, decomposing the total volume into normal operating regulating volume, emergency standby volume, and dead storage volume. The former is calculated based on the objective water volume deviation during power generation of the upstream and downstream power stations connected to the regulating reservoir, as well as the water volume deviation caused by unit output adjustments. The latter is determined based on the extreme accident condition of all power stations connected to the regulating reservoir being shut down in an emergency, combined with the emergency response time. Then, multiple total volume schemes under different emergency response times are proposed, and a reasonable regulating reservoir volume is recommended through comprehensive comparison from multiple dimensions, including safety, emergency response flexibility, and economy.

The invention discloses a device for simulating volume fracturing of a shale reservoir. The device comprises a simulated reservoir cavity, a turnover adjusting mechanism and a pressurized liquid filling mechanism, the simulation reservoir cavity is used for carrying out a volume fracturing simulation experiment; the overturning adjusting mechanism is arranged below the simulated reservoir cavity and is used for adjusting the inclination angle between the simulated reservoir cavity and the horizontal plane; and the pressurizing and liquid filling mechanism is connected with the simulation reservoir cavity and the turnover adjusting mechanism through pipelines, and is used for providing pressure during a simulation experiment and also providing drive for the turnover adjusting mechanism. The device provided by the invention solves the technical problem that fracturing simulation of any dip angle stratums is difficult to simulate.

The present application relates to the technical field of unconventional reservoir development and drainage, and provides a hydrophilic unconventional oil horizontal well volume fracturing post-soaking time design method, which comprises the following steps: S100, evaluating reservoir wettability and determining that the reservoir is a hydrophilic reservoir; S200, establishing a horizontal well segmented cluster fracturing post-reservoir fluid seepage basic physical model and determining basic conditions of the soaking time design method; S300, determining a soaking time calculation formula based on Darcy's law and seepage velocity; S400, collecting data values of parameters of the soaking time calculation formula; and S500, substituting the data values into the soaking time calculation formula to calculate equivalent reasonable soaking time. The method can achieve the technical effect that unconventional reservoir volume fracturing horizontal wells can be opened and oil can be seen.

The invention relates to the field of hydraulic engineering gate control, and particularly discloses an integrated intelligent hoist which comprises a volume measuring and calculating module which divides gridding subunits based on a DEM (digital elevation model), performs curved surface integral in combination with terrain curvature parameters and real-time water depth, dynamically calculates reservoir volume, and calculates the volume of the reservoir; the problem of water storage capacity misjudgment caused by complex terrain and sludge interference in a traditional water level method is solved; the gate opening trigger module generates a flood discharge instruction through volume threshold value comparison; the flood discharge monitoring module extracts a gate contour line through high-definition video monitoring and calibrates the actual opening degree in combination with an image edge detection algorithm, and it is ensured that the overflowing area is accurate and controllable. And the automatic gate closing module calculates the flood discharge required duration according to the flood discharge water amount, the overflowing area and the flow velocity, dynamically corrects the gate closing time point, and prevents excessive flood discharge or insufficient water storage. According to the method, the limitation of a traditional warning water level method and fixed opening control is systematically solved, and the accuracy, safety and resource utilization efficiency of reservoir management are improved.

The invention provides a volume fracturing optimization method for improving the single well yield of a tight oil reservoir. The volume fracturing optimization method comprises the following steps that (1) well selection and layer selection are conducted according to the purpose of increasing the reservoir transformation volume; on one hand, natural fractures are relatively developed, the natural fractures are communicated through fracturing, and net-shaped fractures are achieved; the brittleness index of the reservoir is high, and rock is prone to shear slippage to form complex cracks; 2) optimizing fracturing fluid systems in a prepad fluid stage and a sand-carrying fluid stage; and (3) fracturing construction parameters are optimized. According to a conventional tight reservoir volume fracturing design method and an underground micro-seismic test result, aiming at a tight reservoir with poor reservoir physical properties, developed natural fractures and high brittleness index, the method aims at increasing the reservoir transformation volume and improving the fracture complexity, and on the basis of a conventional conventional volume fracturing large-liquid-amount, high-displacement and low-mucus design mode, the method is suitable for the volume fracturing design of the tight reservoir and the underground micro-seismic test result. And the fracturing fluid, the pumping sequence of fracturing parameters and the technological property are changed, the reservoir transformation volume is further increased, and the single well yield is increased.

Systems and techniques may be used to increase recovery of a geothermal energy resource. An example technique includes selecting a first borehole that extends from a surface of the earth into a first location in a geothermal reservoir, conditioning the first borehole by pumping a fluid into or out of the first borehole at a predetermined operating condition to change a property of the geothermal reservoir, and selecting a second borehole that extends from the surface of the earth into a second location in the geothermal reservoir. The example technique may include enhancing permeability of the geothermal reservoir by using a reservoir stimulation technique on the second borehole, wherein a property of a stimulated reservoir volume is controlled by the property of the geothermal reservoir that was changed by conditioning the first borehole.

The invention belongs to the technical field of petroleum and natural gas engineering, and provides a reservoir volume fracturing effect evaluation method and system, electronic equipment and a storage medium, and the method comprises the following steps: obtaining single mineral content, actual Young modulus and single mineral Young modulus in a rock sample; calculating the mineral dispersity, Young modulus difference degree and mineral adhesion degree of the rock sample according to the single mineral Young modulus of the rock sample in combination with the single mineral content and the actual Young modulus; calculating the fracture potential degree of the reservoir where the rock sample is located according to the Young modulus difference degree and the mineral adhesion degree; according to the mineral dispersity and the fracture potential degree of the reservoir, the fracture network complex index of the reservoir is calculated, and the volume fracturing effect of the reservoir is evaluated according to the fracture network complex index. The reservoir volume fracturing effect is evaluated by comprehensively considering the complexity of the natural fracture and the complexity of the fracture network formed by reservoir transformation, and the precision and accuracy of fracturing effect evaluation are improved.

The invention relates to a power assembly and a vehicle, the power assembly comprises an oil pan and a liquid storage structure, the oil pan is used for containing lubricating oil, and the liquid storage structure is provided with a liquid inlet and a liquid outlet; the power assembly is configured to enable lubricating oil to be suitable for being conveyed to the liquid inlet of the liquid storage structure from the oil pan and suitable for being conveyed to the oil pan from the liquid outlet of the liquid storage structure. The oil pan is configured in the mode that the liquid storage amount of lubricating oil in the oil pan can be adjusted according to requirements. According to the technical scheme, the power assembly can increase the liquid storage amount of the lubricating oil in the liquid storage structure and reduce the liquid storage amount of the lubricating oil in the oil pan according to requirements so as to reduce oil stirring loss, or reduce the liquid storage amount of the lubricating oil in the liquid storage structure and increase the liquid storage amount of the lubricating oil in the oil pan so as to guarantee lubrication and cooling of the power assembly.

A material balance-based method for evaluating the effectiveness of volumetric fracturing in unconventional reservoirs is proposed. First, a set of material balance equations for volumetric fracturing in unconventional reservoirs is established. Then, by designing a calculation process and developing a multi-well synchronous solution program, key evaluation parameters for the volumetric fracturing effect of each well are obtained. Finally, the proportion of injected fluid in each volume during the volumetric fracturing process is quantitatively analyzed, resulting in theoretical charts of volumetric fracturing effect evaluation parameters under different construction parameters. Taking a typical well group in an actual unconventional reservoir block as an example, the volumetric fracturing effect at different well network development stages is quantitatively evaluated. This method, based on material balance, offers a simple parameter input and calculation process, and can provide timely guidance for well network adjustments and comprehensive management of unconventional oil and gas reservoirs.

The invention relates to the technical field of reservoir logging evaluation, in particular to a reservoir water saturation evaluation method based on a volume model, electronic equipment and a storage medium, and the method comprises the following steps: determining shale resistivity, formation water resistivity, reservoir shale content and reservoir porosity; and substituting the shale resistivity, the formation water resistivity, the reservoir shale content and the reservoir porosity into the reservoir volume model response equation to obtain the relative volume of the porosity occupied by the formation water and the relative volume of the porosity occupied by the formation oil, and determining the water saturation of the reservoir.

The invention discloses a petroleum reservoir porosity dynamic analysis method based on logging-while-drilling data, belongs to the field of petroleum and natural gas exploration and development, and is suitable for complex well types such as horizontal wells and the like. The method comprises the following steps: firstly, constructing a logging-while-drilling data real-time acquisition subsystem to complete multi-source data acquisition, transmission, analysis and preprocessing; calculating an initial porosity and a specific surface by combining a capillary bundle model, modeling, and calculating reservoir volume strain and sand migration parameters at the same time; fusing the parameters to construct a dynamic porosity model, solving by using a Newton iteration method, and further constructing a porosity-depth-time three-dimensional dynamic model and visualizing the porosity-depth-time three-dimensional dynamic model; and finally, constructing an analysis system containing multiple modules, wherein the modules interact through the data service middleware. According to the method, the porosity can be dynamically analyzed in real time, the calculation precision is improved, changes are visually presented, and data interaction and application convenience is guaranteed.

This invention discloses a method and system for spatializing flood storage capacity based on remote sensing data, belonging to the field of flood storage capacity spatialization technology. The method includes: determining spatial raster data of rainfall, runoff, and lake / reservoir volumes for the vegetation ecosystem of the target area to be evaluated, based on remote sensing data; and then determining the spatialized flood storage capacity of the target area based on these data. This invention utilizes the rasterizable nature of remote sensing data to achieve the purpose of spatialized calculation of flood storage capacity.

The invention discloses a method and device for determining oil reservoir reserves by using well bottom fluid density, and the method comprises the steps: determining the relation between the original volume of an oil reservoir and the volume of crude oil and water under the initial condition of the oil reservoir; based on a material balance equation, a well bottom multiphase fluid density model is established according to the relation between the original oil reservoir volume and the crude oil volume and the water volume; when the oil reservoir pressure is higher than the bubble point pressure, relevant parameters of at least two tests are obtained; and according to the related parameters and the well bottom multiphase fluid density model, determining the oil reservoir reserves.

The present invention relates to a method for interpreting the true permeability of reservoirs in piebald carbonate rocks. The method comprises: establishing a color standard for dense portions of a piebald carbonate rock core; identifying a core sample that meets the color standard; scanning a cross section of the core sample, calibrating the scan result based on the core sample identification result, and calculating the reservoir fraction and reservoir volume fraction of each cross section of the core sample; measuring the surface volume and rock skeleton volume of the core sample, and correcting the true reservoir porosity of the core sample based on the reservoir volume fraction; measuring the permeability of the core sample, and correcting the true reservoir permeability of the core sample based on the reservoir fraction; constructing a true reservoir porosity and true reservoir permeability chart; calculating the total porosity of the reservoir in the piebald carbonate rock based on a well logging curve; and constructing a true permeability interpretation model for the reservoir in the piebald carbonate rock based on the chart. This method fills a gap in well logging interpretation of porosity and permeability in piebald carbonate reservoirs.

The invention belongs to the technical field of downhole operation fracturing in the petroleum industry, and discloses a fracturing pump injection method for increasing the transformation volume of a tight oil reservoir. Comprising the steps of determining the target current single-section sand amount, calculating the change of net pressure in an alternate injection seam, comparing parameter change, and adding gel in the slickwater sand adding period for alternate injection. By changing an original fracturing pump injection program, the transformation range of a reservoir around a well and the reserves in the fractures are expanded, software serves as a relying tool, the sand amount needed by the fractures meeting the tight oil artificial fracture flow conductivity under the determined liquid amount is simulated, the fracture size difference of conventional injection and alternate injection of single-cluster fractures is simulated, and the flow conductivity of the fractures is calculated. The liquid amount is controlled in a slick water continuous sand adding mode, and the flow conductivity of the crack reaches a target value in a high sand ratio gel sand adding mode.

The invention belongs to the technical field of hydraulic engineering, and particularly relates to a reservoir volume calculation model construction, which comprises the following steps: acquiring contour line data and elevation point data in a reservoir topographic map; constructing a continuous digital elevation surface function through interpolation operation; calculating a second derivative of each point in the function to form a Hessian matrix, converting the surface curved surface structure information into a positive definite metric tensor of each node through a mapping relation, and determining the size and direction of an ideal triangle in a hyperbolic space according to the positive definite metric tensor, so as to complete anisotropic Delaunay triangulation. Calculating the volume below the highest water level of the reservoir in an integral mode; according to the method, key landform features can be accurately captured and restored by using a smaller number of triangles, so that the speed of integral calculation of the storage capacity is remarkably improved. The method is especially suitable for reservoir capacity calculation of reservoirs with complex terrains. The invention also provides a non-transitory readable recording medium storing the program of the method and a system comprising the medium, and the program can be called through a processing circuit to execute the method.

The application relates to the field of gate control of water conservancy projects, and particularly discloses an integrated intelligent hoist, which comprises: a volume calculation module that divides a grid subunit based on a DEM digital elevation model, performs a curvilinear integration in combination with a terrain curvature parameter and a real-time water depth, and dynamically calculates a reservoir volume, thereby solving the problem of misjudgment of storage capacity caused by complex terrain and silt interference in the traditional water level method; a gate opening triggering module that generates a flood discharge instruction through volume threshold comparison; a flood discharge monitoring module that extracts a gate contour line by using high-definition video monitoring and calibrates an actual opening degree in combination with an image edge detection algorithm, thereby ensuring that a flow area is accurately controllable; and an automatic gate closing module that calculates a flood discharge demand duration according to a flood discharge water volume, a flow area and a flow velocity, dynamically corrects a gate closing time point, and prevents excessive flood discharge or insufficient water storage. The application systematically solves the limitations of the traditional warning water level method and fixed opening degree control, and improves the accuracy, safety and resource utilization efficiency of reservoir management.